Chlorophyll a, Total Suspended Matter and Secchi Depth - DOORS 1 cruise, May 2023

The datasest contains Chlorophyll a, Total Suspended Matter and Secchi depth data collected during R/V Mare Nigrum cruise #1 , from 42 stations, located in the Romanian Black Sea area, 1-20 May, 2023 in the framework H2020 DOORS Project. Subsurface water samples (at approximately 1 m depth) were collected at each station using the Niskin bottles in a rosette of the CTD system of the vessel at each station. At stations where the CTD system was not deployed due to the bad weather conditions, a sample bottle was used to collect the water samples. For some stations, additional water samples were collected at the depth where Chl-a maximum appears and the bottom. These discrete water were conditioned for successive laboratory analysis of: Chlorophyll a concentrations determined spectrophotometrically according to Jeffrey and Humphrey, 1975 Total Suspended Matter through dry-weighting according to J. Strickland and T. Parsons, 1972